Tack



FIG. 1 is a top plan view of my tack embodying my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a reduced perspective view thereof. 

The ornamental design for a tack, as shown and described. 